You cannot start the virtual machine because the Mac hard drive has errors. An error occurred while accessing the hard disk: PRL_ERR_DISK_READ_FAILED(820021029),errno=5 (input/output error). See KB 112140.

You cannot start your virtual machine because its hard disk is locked by Parallels Mounter. The error message “There is no operating system installed" appears when you start the virtual machine that was just ejected from Finder. See KB 113617.

My Windows does not boot - it is stuck, but I do not get an error message dialogue

Windows cannot start. It shows a black screen with the error message: “Fatal error: No free memory for XSDT.” See KB 111406.

Windows is stuck at “Trying to boot from SATA drive...” See KB 113342.

Windows boots with a Blue Screen of Death (BSOD)

Such errors are hardware- or driver-related, causing the virtual machine to stop responding in order to prevent damage to the hardware or data. Contact Microsoft for assistance: support.microsoft.com/kb/129845. You can also check our solutions for the following BSOD issues:

After you upgrade from Parallels Desktop version 4 to a later version, you Windows XP virtual machine fails to boot: IRQL_NOT_LESS_OR_EQUAL. See KB 6873

You go to BSOD when trying to start a virtual machine migrated from the PC: BSOD STOP 0x0000007B. See KB 112772.